Results 61 to 70 of about 1,821 (184)

Visualizing Strain‐Coupled Cryogenic Phase Transitions and Defect Dynamics in Perovskite Quantum Dots Using In Situ STEM

open access: yesAdvanced Science, Volume 13, Issue 11, 23 February 2026.
Cryogenic cooling induces an orthorhombic‐to‐monoclinic phase transition in CsPbBr3 quantum dots, accompanied by pronounced strain localization at surfaces and interfaces. Multimodal in situ STEM directly visualize reversible defect healing during moderate cryogenic treatment and irreversible degradation upon prolonged exposure, revealing the intrinsic
Xinjuan Li   +10 more
wiley   +1 more source

Impact Behavior of Recycled Aggregate Concrete Based on Split Hopkinson Pressure Bar Tests

open access: yesAdvances in Materials Science and Engineering, 2013
This paper presents the experimental results of recycled aggregate concrete (RAC) specimens prepared with five different amounts of recycled coarse aggregate (RCA) (i.e., 0, 25%, 50%, 75%, and 100%) subjected to impact loading based on split Hopkinson ...
Yubin Lu   +3 more
doaj   +1 more source

On the Damage Tolerance of Diffusion Bonded Titanium–Aluminum Phase Biomimetic Composites

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT The biomimetic design principles of natural structures involve the strategic integration of stiff and compliant phases to synergistically enhance strength and toughness. Its evolutionary refined natural armor, characterized by a specialized microarchitecture, enables superior damage tolerance.
Shuai Tong   +10 more
wiley   +1 more source

Effect of structurally-induced lateral confinement on split Hopkinson pressure bar test specimens of concrete-like materials

open access: yesEPJ Web of Conferences, 2015
In dynamic testing of concrete-like materials, there is a need in distinguishing structural effects from genuine strain-rate effects. In this paper, this generic problem is studied by numerical simulations based on a phenomenological material model ...
Flores-Johnson E.A., Li Q.M.
doaj   +1 more source

Stoichiometric regulation of nitrogen and carbon fluxes in Acropora coral facing short‐term stress of ammonium loading

open access: yesEcosphere, Volume 17, Issue 1, January 2026.
Abstract Scleractinian coral evolved under nitrogen (N)‐limited conditions. The increase in N flux from anthropogenic activities to these otherwise N‐depleted environments is threatening coral health and coral reef ecosystem function. We tested the effect of elevated ammonium (NH4+) loading on Acropora metabolism responses (respiration, gross primary ...
Molly A. Fisher   +3 more
wiley   +1 more source

Strain rate effects on tensile strength of iron green bodies

open access: yesEPJ Web of Conferences, 2015
Impact tensile strength of iron green bodies with densities of 7.2 and 7.4 g/cm3 was examined by Brazilian test using the split-Hopkinson pressure bar (Kolsky bar) method.
Nishida Masahiro   +4 more
doaj   +1 more source

Shock-induced chemical reaction characteristics of PTFE-Al-Bi2O3 reactive materials

open access: yesDefence Technology
A ternary system of PTFE/Al/Bi2O3 is constructed by incorporating PTFE-based reactive material and thermite for enhancing the energy release of the PTFE-based reactive material.
Chunlan Jiang   +4 more
doaj   +1 more source

The Perzyna Viscoplastic Model in Dynamic Behaviour of Magnetorheological Fluid under High Strain Rates

open access: yesEngineering Transactions, 2015
The extension of viscoplastic model of Perzyna for the field of magnetorheological materials is proposed. Perzyna’s approach is adopted to identify the mechanisms of microscopic rearrangement of ferroelements producing visible increase of material ...
Leszek FRĄŚ
doaj   +1 more source

Experimental and Numerical Evaluation of Rock Dynamic Test with Split-Hopkinson Pressure Bar

open access: yesAdvances in Materials Science and Engineering, 2017
Feasibility of rock dynamic properties by split-Hopkinson pressure bar (SHPB) was experimentally and numerically evaluated with ANSYS/LS-DYNA. The effects of different diameters, different loading rates, and different propagation distances on wave ...
Kang Peng   +8 more
doaj   +1 more source

On the Development of Material Constitutive Model for 45CrNiMoVA Ultra-High-Strength Steel

open access: yesMetals, 2019
For the implementation of simulations for large plastic deformation processes such as cutting and impact, the development of the constitutive models for describing accurately the dynamic plasticity and damage behaviors of materials plays a crucial role ...
Xin Hu   +3 more
doaj   +1 more source

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